#!/usr/bin/env python3
# -*-coding:utf-8-*-

def multi_get_letter(str_input): 
  if isinstance(str_input, unicode): 
    unicode_str = str_input 
  else: 
    try: 
      unicode_str = str_input.decode('utf8') 
    except: 
      try: 
        unicode_str = str_input.decode('gbk') 
      except: 
        print ('unknown coding')
        return
  return_list = [] 
  for one_unicode in unicode_str: 
    return_list.append(single_get_first(one_unicode)) 
  return return_list

def single_get_first(unicode1): 
  str1 = unicode1.encode('gbk') 
  try:     
    ord(str1) 
    return str1 
  except: 
    asc = ord(str1[0]) * 256 + ord(str1[1]) - 65536
    if asc >= -20319 and asc <= -20284: 
      return 'a'
    if asc >= -20283 and asc <= -19776: 
      return 'b'
    if asc >= -19775 and asc <= -19219: 
      return 'c'
    if asc >= -19218 and asc <= -18711: 
      return 'd'
    if asc >= -18710 and asc <= -18527: 
      return 'e'
    if asc >= -18526 and asc <= -18240: 
      return 'f'
    if asc >= -18239 and asc <= -17923: 
      return 'g'
    if asc >= -17922 and asc <= -17418: 
      return 'h'
    if asc >= -17417 and asc <= -16475: 
      return 'j'
    if asc >= -16474 and asc <= -16213: 
      return 'k'
    if asc >= -16212 and asc <= -15641: 
      return 'l'
    if asc >= -15640 and asc <= -15166: 
      return 'm'
    if asc >= -15165 and asc <= -14923: 
      return 'n'
    if asc >= -14922 and asc <= -14915: 
      return 'o'
    if asc >= -14914 and asc <= -14631: 
      return 'p'
    if asc >= -14630 and asc <= -14150: 
      return 'q'
    if asc >= -14149 and asc <= -14091: 
      return 'r'
    if asc >= -14090 and asc <= -13119: 
      return 's'
    if asc >= -13118 and asc <= -12839: 
      return 't'
    if asc >= -12838 and asc <= -12557: 
      return 'w'
    if asc >= -12556 and asc <= -11848: 
      return 'x'
    if asc >= -11847 and asc <= -11056: 
      return 'y'
    if asc >= -11055 and asc <= -10247: 
      return 'z'
    return '' 
def main(str_input): 
  a = multi_get_letter(str_input) 
  b = '' 
  for i in a: 
    b= b+i 
  print(b)
if __name__ == "__main__": 
  str_input=u'欢迎你'
  main(str_input)
